How to get the max and min dates in a collection of documents using jenssegers/laravel-mongodb package?

Question

I have a collection of documents that look like this:

{
    \"_id\" : ObjectId(\"5826182e2e94e0aefc541924\"),
    \"calls\" : [ 
        {
            \"call_dat         


        

Answer 1

You could use Laravel's Collection:

$collection = collect($arr['calls']);

And then, you can use the max and min methods with the relevant key as its argument:

$collection->max('call_date');
$collection->min('call_date');

But I am not sure this will work for date strings. If not, something like this should work:

$value = function($item) { 
  return strtotime($item['call_date']); 
};

$collection->max($value);
$collection->min($value);